Indian Journal of Pure and Applied Physics

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Suitability of K-doped (CH(NH2)2)x(CH3NH3)1-xPbI1-x Perovskite Absorber for Energy Harvesting


Affiliations
1 Department of Physics, Institute of Integrated and Honors Studies, Kurukshetra University, Kurukshetra, Haryana 136 119, India
2 Renewable Energy Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110 067, India
3 Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110 067, India
 

Formamidinium lead iodide (FAPbI3) based perovskite solar cells are more promising than methylammonium based counterparts due to their higher thermal stability. But FAPbI3 film faces serious issue of photoactive phase instability at room temperature, hindering its usefulness as absorber in perovskite solar cells (PSCs). Recently, this problem has been well addressed through additive engineering. In this work, monovalent-cation engineering of FAPbI3 perovskite via MA+ (methylamine cation) and K+ (potassium cation) mixing is performed. We present a detailed analysis of effect of cation doping on structural and optical properties of formamidine based perovskite material. The structural and optical characterizations show positive effect of cation mixing on phase stabilization, crystallization, and absorbance of perovskite thin films. The crystallite size is found to increase on doping with a maximum for K0.05(FA0.83MA0.17)0.95PbI3 sample. Also, the rise in absorbance in UV-Visible region of electromagnetic spectra is observed with doping.

Keywords

Perovskite absorber; Solar cells; Thermal stability; UV-Vis absorption
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  • Suitability of K-doped (CH(NH2)2)x(CH3NH3)1-xPbI1-x Perovskite Absorber for Energy Harvesting

Abstract Views: 91  |  PDF Views: 42

Authors

Harpreet Singh
Department of Physics, Institute of Integrated and Honors Studies, Kurukshetra University, Kurukshetra, Haryana 136 119, India
Shweta Dhakla
Renewable Energy Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110 067, India
Parvesh K. Deendyal
Renewable Energy Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110 067, India
Anand Kumar
Department of Physics, Institute of Integrated and Honors Studies, Kurukshetra University, Kurukshetra, Haryana 136 119, India
Sarvesh Kumar
Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110 067, India
Manish K. Kashyap
Renewable Energy Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110 067, India

Abstract


Formamidinium lead iodide (FAPbI3) based perovskite solar cells are more promising than methylammonium based counterparts due to their higher thermal stability. But FAPbI3 film faces serious issue of photoactive phase instability at room temperature, hindering its usefulness as absorber in perovskite solar cells (PSCs). Recently, this problem has been well addressed through additive engineering. In this work, monovalent-cation engineering of FAPbI3 perovskite via MA+ (methylamine cation) and K+ (potassium cation) mixing is performed. We present a detailed analysis of effect of cation doping on structural and optical properties of formamidine based perovskite material. The structural and optical characterizations show positive effect of cation mixing on phase stabilization, crystallization, and absorbance of perovskite thin films. The crystallite size is found to increase on doping with a maximum for K0.05(FA0.83MA0.17)0.95PbI3 sample. Also, the rise in absorbance in UV-Visible region of electromagnetic spectra is observed with doping.

Keywords


Perovskite absorber; Solar cells; Thermal stability; UV-Vis absorption

References